What Is Myokymia?

Myokymia is the medical term for small, involuntary muscle contractions that most often affect the eyelid. While the twitching can be distracting, it is usually harmless and temporary. Many people experience it at some point in their lives, often during periods of stress, fatigue, or heavy screen use. Unlike other eye conditions, myokymia does not cause vision loss or lasting damage, which is why it is generally considered a minor issue rather than a serious health concern.

Causes of Myokymia

• Stress – Triggers muscle excitability and twitching.
• Fatigue – Lack of rest strains the eyelid muscles.
• Eye Strain – Prolonged screen time without breaks can bring on spasms.
• Caffeine or Alcohol – Both can overstimulate the nervous system.
• Nutrient Deficiency – Low magnesium may affect muscle control.
• Dry Eyes or Irritation – Surface discomfort can cause repeated twitching.

Symptoms of Myokymia

Myokymia symptoms are generally mild but noticeable. The twitch usually begins without warning and may last for only a few seconds before stopping. In some cases, the twitching returns repeatedly throughout the day. People often describe it as a fluttering or flickering feeling in the eyelid. Also, it almost always affects only one eye at a time, most commonly the lower eyelid. The movements can be frustrating, but they do not interfere with sight or cause pain.

• Repetitive flickering of one eyelid
• Spasms lasting seconds to minutes
• Mild eye irritation or a tired sensation
• Typically only one eye affected at a time
• No pain or vision loss

When to Seek Help

Most cases resolve on their own. Still, it’s a good idea to check with a healthcare provider if:

• The twitching continues for more than 2–3 weeks
• Spasms spread to other parts of the face
• You notice drooping eyelids or facial weakness
• The twitching interferes with your daily activities

For practical tips on relief and prevention, see our guide on eyelid twitch remedies.

FAQs About Myokymia

Is it dangerous?
No. It is usually a benign condition that improves without treatment.

How long does myokymia last?
Twitches can last seconds to minutes and may come and go for several days. In addition, persistent symptoms should be evaluated.

Does it affect both eyes?
Most often only one eyelid is affected, though it can occasionally switch sides.

In addition, you can find trusted information from the American Academy of Ophthalmology’s Eye Health A–Z resource.